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/**
* $Id$
*
* ***** BEGIN GPL LICENSE BLOCK *****
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* Contributor(s): Campbell Barton
*
* ***** END GPL LICENSE BLOCK *****
*/
#include "DNA_listBase.h"
#include "RNA_access.h"
#include "bpy_util.h"
#include "BLI_dynstr.h"
#include "MEM_guardedalloc.h"
#include "BKE_report.h"
#include "BKE_context.h"
bContext* __py_context = NULL;
bContext* BPy_GetContext(void) { return __py_context; };
void BPy_SetContext(bContext *C) { __py_context= C; };
PyObject *BPY_flag_to_list(struct BPY_flag_def *flagdef, int flag)
{
PyObject *list = PyList_New(0);
PyObject *item;
BPY_flag_def *fd;
fd= flagdef;
while(fd->name) {
if (fd->flag & flag) {
item = PyUnicode_FromString(fd->name);
PyList_Append(list, item);
Py_DECREF(item);
}
fd++;
}
return list;
}
static char *bpy_flag_error_str(BPY_flag_def *flagdef)
{
BPY_flag_def *fd= flagdef;
DynStr *dynstr= BLI_dynstr_new();
char *cstring;
BLI_dynstr_append(dynstr, "Error converting a sequence of strings into a flag.\n\tExpected only these strings...\n\t");
while(fd->name) {
BLI_dynstr_appendf(dynstr, fd!=flagdef?", '%s'":"'%s'", fd->name);
fd++;
}
cstring = BLI_dynstr_get_cstring(dynstr);
BLI_dynstr_free(dynstr);
return cstring;
}
int BPY_flag_from_seq(BPY_flag_def *flagdef, PyObject *seq, int *flag)
{
int i, error_val= 0;
char *cstring;
PyObject *item;
BPY_flag_def *fd;
*flag = 0;
if (PySequence_Check(seq)) {
i= PySequence_Length(seq);
while(i--) {
item = PySequence_ITEM(seq, i);
cstring= _PyUnicode_AsString(item);
if(cstring) {
fd= flagdef;
while(fd->name) {
if (strcmp(cstring, fd->name) == 0)
(*flag) |= fd->flag;
fd++;
}
if (fd==NULL) { /* could not find a match */
error_val= 1;
}
} else {
error_val= 1;
}
Py_DECREF(item);
}
}
else {
error_val= 1;
}
if (*flag == 0)
error_val = 1;
if (error_val) {
char *buf = bpy_flag_error_str(flagdef);
PyErr_SetString(PyExc_AttributeError, buf);
MEM_freeN(buf);
return -1; /* error value */
}
return 0; /* ok */
}
/* for debugging */
void PyObSpit(char *name, PyObject *var) {
fprintf(stderr, "<%s> : ", name);
if (var==NULL) {
fprintf(stderr, "<NIL>");
}
else {
PyObject_Print(var, stderr, 0);
fprintf(stderr, " ref:%d ", (int)var->ob_refcnt);
fprintf(stderr, " ptr:%p", (void *)var);
fprintf(stderr, " type:");
if(Py_TYPE(var))
fprintf(stderr, "%s", Py_TYPE(var)->tp_name);
else
fprintf(stderr, "<NIL>");
}
fprintf(stderr, "\n");
}
void PyLineSpit(void) {
char *filename;
int lineno;
PyErr_Clear();
BPY_getFileAndNum(&filename, &lineno);
fprintf(stderr, "%s:%d\n", filename, lineno);
}
void BPY_getFileAndNum(char **filename, int *lineno)
{
PyObject *getframe, *frame;
PyObject *f_lineno= NULL, *co_filename= NULL;
if (filename) *filename= NULL;
if (lineno) *lineno = -1;
getframe = PySys_GetObject("_getframe"); // borrowed
if (getframe==NULL) {
PyErr_Clear();
return;
}
frame = PyObject_CallObject(getframe, NULL);
if (frame==NULL) {
PyErr_Clear();
return;
}
if (filename) {
co_filename= PyObject_GetAttrStringArgs(frame, 1, "f_code", "co_filename");
if (co_filename==NULL) {
PyErr_SetString(PyExc_SystemError, "Could not access sys._getframe().f_code.co_filename");
Py_DECREF(frame);
return;
}
*filename = _PyUnicode_AsString(co_filename);
Py_DECREF(co_filename);
}
if (lineno) {
f_lineno= PyObject_GetAttrString(frame, "f_lineno");
if (f_lineno==NULL) {
PyErr_SetString(PyExc_SystemError, "Could not access sys._getframe().f_lineno");
Py_DECREF(frame);
return;
}
*lineno = (int)PyLong_AsSsize_t(f_lineno);
Py_DECREF(f_lineno);
}
Py_DECREF(frame);
}
/* Would be nice if python had this built in */
PyObject *PyObject_GetAttrStringArgs(PyObject *o, Py_ssize_t n, ...)
{
Py_ssize_t i;
PyObject *item= o;
char *attr;
va_list vargs;
va_start(vargs, n);
for (i=0; i<n; i++) {
attr = va_arg(vargs, char *);
item = PyObject_GetAttrString(item, attr);
if (item)
Py_DECREF(item);
else /* python will set the error value here */
break;
}
va_end(vargs);
Py_XINCREF(item); /* final value has is increfed, to match PyObject_GetAttrString */
return item;
}
int BPY_class_validate(const char *class_type, PyObject *class, PyObject *base_class, BPY_class_attr_check* class_attrs, PyObject **py_class_attrs)
{
PyObject *item, *fitem;
PyObject *py_arg_count;
int i, arg_count;
if (base_class) {
if (!PyObject_IsSubclass(class, base_class)) {
PyObject *name= PyObject_GetAttrString(base_class, "__name__");
PyErr_Format( PyExc_AttributeError, "expected %s subclass of class \"%s\"", class_type, name ? _PyUnicode_AsString(name):"<UNKNOWN>");
Py_XDECREF(name);
return -1;
}
}
for(i= 0;class_attrs->name; class_attrs++, i++) {
item = PyObject_GetAttrString(class, class_attrs->name);
if (py_class_attrs)
py_class_attrs[i]= item;
if (item==NULL) {
if ((class_attrs->flag & BPY_CLASS_ATTR_OPTIONAL)==0) {
PyErr_Format( PyExc_AttributeError, "expected %s class to have an \"%s\" attribute", class_type, class_attrs->name);
return -1;
}
PyErr_Clear();
}
else {
Py_DECREF(item); /* no need to keep a ref, the class owns it */
if((item==Py_None) && (class_attrs->flag & BPY_CLASS_ATTR_NONE_OK)) {
/* dont do anything, this is ok, dont bother checking other types */
}
else {
switch(class_attrs->type) {
case 's':
if (PyUnicode_Check(item)==0) {
PyErr_Format( PyExc_AttributeError, "expected %s class \"%s\" attribute to be a string", class_type, class_attrs->name);
return -1;
}
if(class_attrs->len != -1 && class_attrs->len < PyUnicode_GetSize(item)) {
PyErr_Format( PyExc_AttributeError, "expected %s class \"%s\" attribute string to be shorter then %d", class_type, class_attrs->name, class_attrs->len);
return -1;
}
break;
case 'l':
if (PyList_Check(item)==0) {
PyErr_Format( PyExc_AttributeError, "expected %s class \"%s\" attribute to be a list", class_type, class_attrs->name);
return -1;
}
if(class_attrs->len != -1 && class_attrs->len < PyList_GET_SIZE(item)) {
PyErr_Format( PyExc_AttributeError, "expected %s class \"%s\" attribute list to be shorter then %d", class_type, class_attrs->name, class_attrs->len);
return -1;
}
break;
case 'f':
if (PyMethod_Check(item))
fitem= PyMethod_Function(item); /* py 2.x */
else
fitem= item; /* py 3.x */
if (PyFunction_Check(fitem)==0) {
PyErr_Format( PyExc_AttributeError, "expected %s class \"%s\" attribute to be a function", class_type, class_attrs->name);
return -1;
}
if (class_attrs->arg_count >= 0) { /* -1 if we dont care*/
py_arg_count = PyObject_GetAttrString(PyFunction_GET_CODE(fitem), "co_argcount");
arg_count = PyLong_AsSsize_t(py_arg_count);
Py_DECREF(py_arg_count);
if (arg_count != class_attrs->arg_count) {
PyErr_Format( PyExc_AttributeError, "expected %s class \"%s\" function to have %d args", class_type, class_attrs->name, class_attrs->arg_count);
return -1;
}
}
break;
}
}
}
}
return 0;
}
/* returns the exception string as a new PyUnicode object, depends on external StringIO module */
PyObject *BPY_exception_buffer(void)
{
PyObject *stdout_backup = PySys_GetObject("stdout"); /* borrowed */
PyObject *stderr_backup = PySys_GetObject("stderr"); /* borrowed */
PyObject *string_io = NULL;
PyObject *string_io_buf = NULL;
PyObject *string_io_mod= NULL;
PyObject *string_io_getvalue= NULL;
PyObject *error_type, *error_value, *error_traceback;
if (!PyErr_Occurred())
return NULL;
PyErr_Fetch(&error_type, &error_value, &error_traceback);
PyErr_Clear();
/* import StringIO / io
* string_io = StringIO.StringIO()
*/
if(! (string_io_mod= PyImport_ImportModule("io")) ) {
goto error_cleanup;
} else if (! (string_io = PyObject_CallMethod(string_io_mod, "StringIO", NULL))) {
goto error_cleanup;
} else if (! (string_io_getvalue= PyObject_GetAttrString(string_io, "getvalue"))) {
goto error_cleanup;
}
Py_INCREF(stdout_backup); // since these were borrowed we dont want them freed when replaced.
Py_INCREF(stderr_backup);
PySys_SetObject("stdout", string_io); // both of these are free'd when restoring
PySys_SetObject("stderr", string_io);
PyErr_Restore(error_type, error_value, error_traceback);
PyErr_Print(); /* print the error */
PyErr_Clear();
string_io_buf = PyObject_CallObject(string_io_getvalue, NULL);
PySys_SetObject("stdout", stdout_backup);
PySys_SetObject("stderr", stderr_backup);
Py_DECREF(stdout_backup); /* now sys owns the ref again */
Py_DECREF(stderr_backup);
Py_DECREF(string_io_mod);
Py_DECREF(string_io_getvalue);
Py_DECREF(string_io); /* free the original reference */
PyErr_Clear();
return string_io_buf;
error_cleanup:
/* could not import the module so print the error and close */
Py_XDECREF(string_io_mod);
Py_XDECREF(string_io);
PyErr_Restore(error_type, error_value, error_traceback);
PyErr_Print(); /* print the error */
PyErr_Clear();
return NULL;
}
char *BPy_enum_as_string(EnumPropertyItem *item)
{
DynStr *dynstr= BLI_dynstr_new();
EnumPropertyItem *e;
char *cstring;
for (e= item; item->identifier; item++) {
if(item->identifier[0])
BLI_dynstr_appendf(dynstr, (e==item)?"'%s'":", '%s'", item->identifier);
}
cstring = BLI_dynstr_get_cstring(dynstr);
BLI_dynstr_free(dynstr);
return cstring;
}
int BPy_reports_to_error(ReportList *reports)
{
char *report_str;
report_str= BKE_reports_string(reports, RPT_ERROR);
if(report_str) {
PyErr_SetString(PyExc_SystemError, report_str);
MEM_freeN(report_str);
}
return (report_str != NULL);
}
int BPy_errors_to_report(ReportList *reports)
{
PyObject *pystring;
char *cstring;
char *filename;
int lineno;
if (!PyErr_Occurred())
return 1;
/* less hassle if we allow NULL */
if(reports==NULL) {
PyErr_Print();
PyErr_Clear();
return 1;
}
pystring= BPY_exception_buffer();
if(pystring==NULL) {
BKE_report(reports, RPT_ERROR, "unknown py-exception, could not convert");
return 0;
}
BPY_getFileAndNum(&filename, &lineno);
cstring= _PyUnicode_AsString(pystring);
BKE_reportf(reports, RPT_ERROR, "%s\nlocation:%s:%d\n", cstring, filename, lineno);
fprintf(stderr, "%s\nlocation:%s:%d\n", cstring, filename, lineno); // not exactly needed. just for testing
Py_DECREF(pystring);
return 1;
}
|